Marshy plants with stout rootstocks. Leaves not differentiated into petiole and blade, lateral basal nerves reticulate. Spadix cylindric, laterally placed, densely flowered, not enclosed in the spathe; flowers bisexual. Tepals 6, orbiculate, curved. Filaments linear, flat, anthers extrorse. Ovary conical, ovules many, pendulous. Seeds oblong,